The productivity of coconut in Guerrero, Mexico has decreased substantially. The experts recommended a diagnosis of the soil fertility before launching a sound reforestation program. The introduction of Green Dwarf Coconut (GDC) due to its high productivity was suggested; however, nitrogen (N) was of higher interest since GDC is a highly demanding material. In this work, the contents, in parts per million (ppm), of nitrogen (N) as nitrate (N-NO 3 ) as well as its chemical variability

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... t of Variation) and spatial distribution (Kriging method) was determined at 0 -30 and 30 -60 cm deep in the soil. Two GDC commercial plantations were selected and the study was complemented with foliar N (%) analysis. Two farms: Las Tunas (LT) of 9 hectares and Aguas Blancas (AB) of 5 hectares were sampled taking one point per hectare at both depths, one meter from the trunk. In LT, the overall average of N-NO 3 , at 0 -30 cm, was rated as MEDIUM and at 30 -60 cm as LOW. On the other hand, in AB the general average of N-NO 3 was graded as LOW at both depths. The two farms showed important chemical heterogeneity as indicated by the HIGH CV's (%). Regardless of the specific values of N, in LT the spatial distribution of N seems to be the same between both depths with an approximate area of 20% classified as LOW (14 -18 ppm) and 80% as MEDIUM 20 -28 (ppm). On the other hand, in AB the spatial distribution was contrasting between depths. At 0 -30 cm deep, an approximate area of How to cite this paper: Ramírez-Silva,